All very good advice.
BUT - how close is he? How much bandwidth is he occupying? How many dB
down at how many Hz from the center of his signal?
AND VERY important -- K1JT has repeatedly advised to NOT to any
filtering ahead of WSJT-X, because the phase shift associated with the
filter degrades decoding.
I have locals in the range of 5-20 miles from me and both they and I are
running power (me, a KPA500). Depending on what direction each of our
antennas are pointed, the "red" can be pretty wide. But that does NOT
mean that WSJT-X cannot decode signals in that red zone! Further, the
colors in the waterfall are absolute level at input to WSJT-X. ANY
signal will have sidebands. If, for example, he's 40 over S9 (not
unusual at two miles), even the cleanest of radios with modulation will
be S9 within 200-300 Hz of his signal.
73, Jim K9YC
On 8/27/2017 11:07 AM, Bob McGraw K4TAX wrote:
A couple of things to check. Be sure the Line Output from the radio is not set
to high such that it is driven into distortion.
Also check the computer CODEC gain isn't too high and it being driven into
distortion. This is set in Windows Sound device Recording Level.
Also make sure the ALC is ON and handling the signal. Perhaps some attention on
the input of the receiver is in order.
The receiver Noise Blanker should be OFF.
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